I am developing an intraday (20m) system for YM. I don't know much about the practicalities of trading a system, just a programmer. Targets are $1100 Stops are $600 Avg win is $125 All stats per contract. I think I would need about 10K per contract. I don't think I would trade it though unless I had 2 yrs of backhistory.
those stats actually look pretty good. I would examine the profit target, as the run-up shows it to be "too far away". Depending on whether you enter/exit on limits/stops/market you have to give YM at least 5 ticks slip and for limits make sure you trade through your limit in simulation.